Ocean FEST is a program of hands-on, ocean-themed science activities for students in grades 3-6 and/or their families. Our goals are to: (1) educate participants about ocean and earth science issues that are relevant to their communities; and (2) inspire students--especially those from underrepresented groups--to pursue careers in the ocean and earth sciences. In this activity, students are given arts and crafts materials to design and construct a microbe. The goal is to make a microbe that sinks very slowly through the water column. They also must protect their microbe from predators.